我的部分布局有问题。我正在以编程方式添加按钮,因为我想做一些类似面包屑的事情。我的解决方案效果很好。如果我在第一个活动中,我会显示一个按钮。如果我转到第二个,我会显示两个按钮。这是代码:
public class TabsGenerator extends LinearLayout{
public TabsGenerator(Context context) {
super(context);
}
public View addNewLinearLayout(Context context, ArrayList<String> descriptions) {
final HorizontalScrollView horizontalView = new HorizontalScrollView(context);
LinearLayout linearLayout = new LinearLayout(context);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
params.height = 60;
linearLayout.setLayoutParams(params);
horizontalView.setLayoutParams(params);
postDelayed(new Runnable() {
public void run() {
horizontalView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
}
}, 100L);
linearLayout.setGravity(Gravity.TOP);
List<View> components = getButtons(context, descriptions);
for(View component : components) {
linearLayout.addView(component);
}
horizontalView.addView(linearLayout);
return horizontalView;
}
public List<View> getButtons(Context context, ArrayList<String> descriptions) {
List<View> buttons = new ArrayList<View>();
for(int i = 0; i < descriptions.size(); i++) {
buttons.add(createButton(context,i, descriptions));
}
return buttons;
}
public View createButton(final Context context, final int i, final ArrayList<String> descriptions){
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
params.leftMargin = -20;
final Button button = new Button(context);
button.setText(SecondActivity.descriptions.get(i));
button.setBackgroundDrawable(getResources().getDrawable(R.drawable.paseknawigacji));
button.setHorizontallyScrolling(true);
button.setEllipsize(TruncateAt.END);
button.setSingleLine();
button.setWidth(20);
if(i==1)
button.bringToFront();
button.setLayoutParams(params);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ActivityManager am = (ActivityManager) context.
getSystemService(Activity.ACTIVITY_SERVICE);
String packageName = am.getRunningTasks(1).get(0).topActivity.getPackageName();
String className = am.getRunningTasks(1).get(0).topActivity.getClassName();
final String StringClassname = packageName+"."+descriptions.get(i);
Class<?> c = null;
if(StringClassname != null) {
try {
c = Class.forName(StringClassname );
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Intent intent = new Intent();
intent.setClassName(context,StringClassname);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
if(!(StringClassname.contains(className))){
for(int j = 0; j<descriptions.size()-1;j++)
if(i<descriptions.size()-1)
descriptions.remove(i+1);
context.startActivity(intent);
}
}
});
return button;
}
}
我有一个问题,因为按钮已添加到布局中,但每个按钮都以三角形结尾。当我添加第二个按钮时,他覆盖了这个形状。它的外观是这样的: 我想把每个按钮都放在前端。我怎么能这样做?
编辑:也许是在android中创建面包屑的其他方法?